Steam-boiler



UNITED STATES PATENT OFFICE.

ROBERT FERGUSON, OF NEW ORLEANS, LOUISIANA.

STEAM-B OILER.

Specification of Letters Patent No. 17,924, dated August 4, 18157.

To all whom t may concern:

Be it known that I, ROBERT FERGUSON, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and useful Improvement in Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing forming part of this specication, in which Figure 1 is a vertical section of the boiler on of Fig. 3. Fig. 2 is a vertical section on fz/ y Fig. 1 and Fig. 3 is a horizontal section on z e Figs. 1 and 2.

Similar characters of reference in the several figures vdenote the same part.

rIhe nature of my invention consists in a peculiar arrangement of flues and water space hereinafter to be set forth.

The construction of the boiler will readily be understood from the following description and reference to the drawing.

A A A are the wat-er spaces, rising from the bottom of the boiler, and terminating at the respective elevations shown in the drawing. Partitions E and F are concentric portions of right cylinders of circular base, they are separated the required distance and connected together at bottom as shown in Fig. 1. Partition F rises to within about five inches of the water line, and is riveted to head D, which constitutes the termination of the first part P of the flue and the commencement of the downward portion P. Partition E rises to the top of the boiler and is riveted to head O. The heads D and O are connected by a stay N. f

The partitions I and K which form the internal water space, are closed at top and bottom as seen at a a', and are riveted to partition F throughout their vertical contact with said partition. The partitions G H constituting the walls of the external water space are riveted to partition E along their contact in the same manner as I and K to partition F. The junction I with F and G with E have one half of their rivet holes open, as shown in Fig. 3, and in detached view X, for giving a free circulation in the water spaces. The fire chamber M is semicylindrical, the arch constituting a water space in communication with water space E F. The descending and ascending flues P P have the cross section of a lune, as

shown in Fig. 3, and are of such dimensions as to allow the free transmission to the chimney of the products of combustion. The two are connected at bottom by the box PX, which can be removed at pleasure for cleaning. Flue P terminates in the smoke drum R surrounding the top of the boiler, and from which the chimney R issues. The steam pipe T descends through the head D into the fire box to the surface of the fuel, and again rises to such a position in the steam drum T as may appear convenient for discharge. The valve f placed in the steam pipe close to the head where it reenters the boiler, is for the purpose of charging the pipe with water, to prevent it from being injured by lire while in the act of generating steam, or during any temporary suspension of operations. The stem of the valve being carried through the side of the boiler by means of an ordinary stuffing box. The object of this steam pipe is the superheating of the steam when required for boiling syrup or other liquid.

The pipe C rises vertically to a level with the top of the internal water space and there has a horizontalv portion following the curve of said water space. The lower extremities of this pipe are open, and the horizontal portion is perforated as shown at m Fig. 1. This pipe receives a supply of air at bottom, which becomes heated as it rises and issuing through the perforationsm furnishes a Asupply of oxygen for the more complete combustion of the gases which are leaving the furnace unconsumed.

The construction of iues and water spaces above described furnishes a large amount of heating surface; and the form of the water spaces renders them capable o-f sustaining a Very high degree of pressure without the use of stays.

I claim- The eccentric arrangement of the water spaces A A A, connected with each other, and alternating with the flues of lune cross section, substantially as, and for the purpose specified.

In testimony whereof, I have hereunto signed my name before two subscribing witnesses.

ROBT. FERGUSON.

Witnesses:

F. M. CoRRY, J. H. HEDGES. 

